Chain mortising-machine.



Patented July I6, 190i.

J. BAWLINSUN. CHAIN MORTISING MACHINE.

(Application filed Apr. 20, 1901.)

WE E5555 EX UJ? 6, I J.RAWLINSON..

UrvrTEn STnTEs PATENT QEETEEO JOSEPH RAWVLINSON, ORGARSTON, NEAR LIVERPOOL, ENGLAND.

CHAEN MORTBSING MACHENE.

QPEGIFIGATION forming part of Letters Patent NO. 678,763, dated July 16, 1901.

Application filed April 20. 1901. Serial No. 56,790. (No model.)

To all whom it may concern:

Be it known that I, JOSEPH RAVVLINSON, contractor, a subject of the King 01": Great Britain, residing at Wellington street, Garston, near Liverpool, in the county of Lancaster, England, have invented certain new and useful Improvements in or Connected with Chain lllortising-lliachines, of which the following is a specification.

This invention relates to chain mortisingmachines, and has for its object to provide means for enabling the work-piece to be accurately and rapidly adjusted on the cuttingtable according to the desired positions of the series of holes to be out without necessitating the previous marking out of each piece. The adjustable stop hitherto provided with such machines usually consists of a rod which is adjusted to abut against the end ofthe piece of wood to be mortised, which stop has consequently to be readjusted for each hole. This is such a great disadvantage that such adjustable stops are rarely or never used, as in practice it is found that much time can actually be saved by dispensing with the stop and measuring and marking out each work-piece separately. This is particularly the case with the boards of door and window frames in which a series of mortise-holes have to be cut at predetermined points in a very large number of precisely similar pieces.

This invention consists in providing the machine-table or a board or plate adapted to be fixed thereon with a suitable number of stops capable of being depressed out of action, but provided with springs tending normally to return them to their acting position in such a way that the Work-piece may be placed against any one stop as such of the other stops as would otherwise interfere with the work are depressed by the act of the board being placedon them. It will be seen, therefore, that by my invention in cutting a series of mortises the work-piece after being placed against the first stop and the first mortise cut need only be slightly lifted over said stop, thus depressing it, and the work-piece then moved up against the next or any desired stop ready for the next cut, and so on.

My invention further consists in making these stops in such a cheap, simple, and inexpensive form that they may be quickly and readily attached to a gage-board and freely used without regard to first cost and Without the necessity of detaching them from the gage-board at the end of a job in order to use them over again on the next job-that is to say, the cost of the stops is so trifling that the old gage-boards may be thrown away or laid aside for a future occasion and new stops used on. the next job. Having once arranged the stops for a given job, any number of pieces can thus be cut with precisely similar mortises without any further adjustment of the stops. For this purpose the stops may either be fixed on carriers slidingly mounted in one or more grooves or recesses in the table or in an auxiliary frame or board to be fixed thereon and provided with means adapted to clamp them in any desired positions or a separate board may be provided or made for each job, having the depressible stops mounted only in the required positions for that job.

In the accompanying drawings, Figure 1 is a sectional side view of a stop-board constructed in accordance with my invention. Fig. 2 is a cross-section of such a stop-board. Fig. 3 is a detail view of one of the springstops detached from the board; and Fig. 4c is a view in perspective, showing the Way in which the stop-board is fixed on the w0rk-table of a chain mortising-machine.

A is the stop-board, which is slotted out underneath, as shown in Fig. 2, to facilitate the attachment of the stops and to allow sufficient room for the stops to be depressed Without encountering the table of the machine or any other obstacle.

B O D are stops constructed, as shown in Fig. 3, ofa piece of cylindrical or like shaped metal E and a spring-plate F, provided at its end with one or more screw-holes G.

The stop-board A may be of any desired length. The stops B C D, etc, are mounted in it from beneath by means of screws pass ing through the screw-holes G, the pin of each stop passing through a hole cut in the central part of the stop-board, as shown.

stops are so arranged that when a workpiece is placed against the first stop 13 in the mortising-machine and the machine set in operation a slot is out in said work-piece at the required point. The work-piece is then placed The 7 against the second stop 0, as shown in dotted lines in Fig. 4, the first stop B being then depressed, and when the machineis again operated aslot is cut at the next required point, and so on for any number of slots, one stop being provided in the stop-board for each slot required to be cut in the work-piece. Any number of work-pieces may be similarly operated upon and they will all be slotted in exactly corresponding positions, so that extreme regularity of results is obtained, which is impossible when each work-piece has to be separately measured beforehand. Slots H may be cut in the stop-board to allow the chain of the mortising-machine to pass through this board to insure a clean-cut slot in the work-piece.

Where a separate stop-board is to be used for each job,.as before mentioned, which will be found a cheap method of procedure where large numbers of pieces of standard pattern are to be cut, the workman may be simply furnished with the depressible keys and instructed to mount a suitable number in the required positions in a board which he will recess and bore to receive them in the manner described.

Although this device has been described for use with a mortising-machine, it is equally applicable to boring, drilling, sawing, and other machines requiring the recurrent adjustment of a number of successive Workpieces to be equally operated upon.

I declare that what I claim is- 1. In a machine of the type described, in combination with a board or table on which the work is adapted to be placed, one or more stops or gages each consisting of a pin projecting slightly above the surface of the said table and attached at its lower end to the end of a straight spring, whose other end is attached to the under side of the table, whereby the spring tends to hold the pin in the said position, but so as to allow it to be depressed to a level with the surface of the table by a slight pressure.

2. In a machine of the class described, in combination with a board or table on which the work is adapted to be placed, and having a longitudinal recess or groove in its under side, one or more stops or gages, each consisting of a pin projecting slightly above the surface of the said table and attached at its lower end to the end of a straight spring whose other end is secured to the under side of the said table within the said groove.

3. In a machine of the type described, a stop or gage for the work consisting of an L- shaped piece, one leg of which is in the form of a pin adapted to project slightly in the path of the work, and the other in the form of a straight spring, Whose free end is provided with means for attaching it to the table.

4. In a machine of the type described, a stop or gage for the work consisting of an L- shaped piece, one leg of which is in the form of a pin adapted to project slightly in the path of the work, and the other in the form of a straight spring, whose free end is provided with one or more screw holes or eyes, whereby the stop may be quickly and easily attached to and detached from the work-table.

5. In a machine of the class described, the combination of a table or rest for the work having a longitudinal groove on the reverse side, and having one or more holes properly placed and spaced to provide a clearance for the tool, a series of holes appropriately spaced with relation to said first-mentioned hole or holes and adapted to receive stops, and a series of depressible stops in said stop-holes, so as to provide rests for the work distant from the clearance hole or holes in each case by the same length as the length from the end of the work to a required mortise.

In witness whereof I have hereunto signed my name, this &th day of April, 1901, in the presence of two subscribing witnesses.

JOSEPH RAWLINSON.

Witnesses:

JOSEPH J. ROYDEN, F. P. EVANS. 

